Photovoltaic film sticking machine
By designing horizontal and longitudinal film sticking mechanisms in the photovoltaic film sticking machine, including film sticking components, feeding components, heating parts and shearing parts, the problems of shortening component life and inaccurate pasting in the prior art are solved, and a more efficient and accurate reflective film sticking process is achieved.
Patent Information
- Application Number
- CN202421602878.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-08
AI Technical Summary
During the production process of existing photovoltaic film stickers, the heating area of the hot air duct will cover the location of the press wheel and the cutting knife, resulting in a shortening of the service life of these components; the reflective film is easily adhered to the limit seat and the hot air duct after being heated, affecting the accuracy of the paste; the cutting knife needs to collide with the limit seat during cutting, affecting the service life; the cutter's tail material after cutting is easily disengaged from control, resulting in insufficient adhesion length and reducing accuracy.
A photovoltaic filming machine is designed, adopting transverse and longitudinal filming mechanisms, including film assembly, feed assembly, heating part and shearing part. The film assembly realizes automatic feeding and pasting of the reflective film through the film pressing and feeding parts. The heating parts heat the contact points between the reflective film and the glass to ensure hot melt adhesion; the shearing parts cut the reflective film tape through an interlaced cutter to avoid collision with other components.
Through this design, the accuracy and stability of the reflective film pasting are improved, the service life of the pressing wheel and cutting knife is extended, the deviation of the tail end of the reflective film is reduced, and the accuracy, stability and safety of the entire film pasting process is improved.
Smart Images
Figure CN223030409U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of photovoltaic module production, and in particular to a photovoltaic film laminating machine. Background Art
[0002] Solar cell modules are the core part of a solar power generation system and also the most important part. Their function is to convert solar energy into electrical energy, which is either sent to a storage battery for storage or used to drive a load. A photovoltaic module includes a backplane, a glass plate covering the backplane, and a number of battery modules located between the two. There will be gaps between the battery modules. Usually, a reflective film is pasted on the glass plate to make full use of the light energy in the gaps between the battery modules and improve the light energy utilization rate.
[0003] The prior art designs a film laminating mechanism to realize the automatic pasting of a reflective film strip. The film laminating mechanism includes a hot pressing component and a cutting component for cutting the reflective film. The hot pressing component includes a pressing wheel and a hot air pipe installed in front of the pressing wheel; the cutting component includes a cutting knife and a limiting seat for supporting the cutting knife, and the hot air pipe is located below the cutting knife. During production, the reflective film passes through the gap between the cutting knife and the limiting seat, crosses above the hot air pipe, and reaches below the pressing wheel. The pressing wheel presses the reflective film onto the glass, and the hot air pipe heats the reflective film in the area above it; when cutting is required, the cutting knife approaches the limiting seat to cut the reflective film on the limiting seat.
[0004] However, the heating area of the hot air pipe will cover the positions where the pressing wheel and the cutting knife are located. During production, the hot air will heat the pressing wheel and the cutting knife, reducing the service life of the pressing wheel and the cutting knife; and the reflective film is prone to adhering to the limiting seat and the hot air pipe after being heated, affecting the accuracy of the reflective film pasting. When cutting, the cutting knife needs to collide with the limiting seat, affecting the service life of the cutting knife; and after cutting, the heated tail material of the reflective film is prone to getting out of control, resulting in an insufficient length of the reflective film pasted on the glass and reducing the accuracy of the reflective film pasting. Therefore, improvement is needed. Utility Model Content
[0005] In order to improve the accuracy of reflective film pasting, this application provides a photovoltaic film laminating machine.
[0006] A photovoltaic film laminating machine provided by this application adopts the following technical solutions:
[0007] A photovoltaic film pasting machine includes a lifting and moving mechanism for transporting glass, a transverse film pasting mechanism and a longitudinal film pasting mechanism arranged in the length direction of the lifting and moving mechanism; the transverse film pasting mechanism includes a plurality of film pasting devices arranged in series transversely and a linear module for driving the movement of the film pasting devices, and the longitudinal film pasting mechanism includes a plurality of film pasting devices arranged side by side longitudinally and a linear module for driving the movement of the film pasting devices; the film pasting device includes a plurality of film pasting components and a feeding component for supplying a reflective film tape to the film pasting components; the film pasting component includes a tooling plate, a film pressing member is arranged on one side of the tooling plate close to the glass, the film pressing member can clamp the reflective film tape and press it on the glass, a feeding member is arranged on the tooling plate close to the feeding component, and the feeding member is used for feeding the reflective film tape into the film pressing member; a heating member for heating the reflective film tape is arranged between the film pressing member and the feeding member, and a shearing member is arranged between the heating member and the film pressing member to shear the reflective film tape.
[0008] By adopting the above technical solution, the operator guides the end of the reflective film tape into the feeding member. When it is necessary to paste the reflective film tape, the feeding member works once to feed the end of the reflective film tape into the film pressing member, and the film pressing member presses the end of the reflective film tape on the glass; at the same time, the heating member heats the contact point between the reflective film tape and the glass, so that the reflective film tape is hot-melt pasted on the glass. The movement of the workbench drives the tooling plate to move relative to the glass, and the film pressing member continuously pulls out the reflective film tape and pastes it on the glass as the tooling plate moves. When the reflective film tape on the glass reaches the set length, the shearing member works once to cut the reflective film tape at the position between the film pressing member and the feeding member, and the feeding member clamps the end of the subsequent reflective film tape; at this time, the workbench continues to move, and the film pressing member pastes the remaining reflective film tape on the glass. During the film pasting process, the film pressing member always clamps the reflective film tape, reducing the occurrence of the situation of the reflective film tape shifting and improving the accuracy during the pasting process; and after the reflective film tape is cut, its rear end is still clamped by the film pressing member, reducing the occurrence of the situation of the tail end of the reflective film tape being pasted offset. The heating member heats the contact point between the reflective film tape and the glass, improving the accuracy of heating and reducing the occurrence of the situation of the molten reflective film tape contacting the film pressing member or the shearing member and causing the reflective film tape to be damaged, and improving the accuracy of the pasting process. Compared with cutting the reflective film tape in the prior art, the present application adopts a shearing method to improve the accuracy of cutting the reflective film tape.
[0009] Optionally, the film pressing member includes a downward pressing air cylinder, a pressing roller and a film outlet head. The outer shell of the downward pressing air cylinder is installed on the tooling plate, the pressing roller is rotatably installed on the air cylinder shaft of the downward pressing air cylinder, the downward pressing air cylinder drives the pressing roller to approach or move away from the glass in the vertical direction, and the pressing roller can press the reflective film tape on the glass; the film outlet head is installed on the tooling plate and is located on one side of the pressing roller close to the feeding component. When the pressing roller is at its lowest point, it can jointly clamp the reflective film tape with the film outlet head; there is a gap between the bottom wall of the film outlet head and the glass.
[0010] By adopting the above technical solution, the pressure roller and the film outlet head jointly clamp the reflective film belt. The pressure roller rolls to flatten the reflective film belt on the glass, discharging the air that may exist between the reflective film belt and the glass, making the adhesion between the reflective film belt and the glass closer. When the reflective film belt is cut, the tail end of the remaining reflective film belt is still jointly clamped by the pressure roller and the film outlet head, and the remaining tail material of the reflective film belt is pasted on the glass, reducing the occurrence of deviation in the adhesion of the tail end of the reflective film belt. The stability and accuracy of the adhesion of the reflective film belt are improved.
[0011] Optionally, a film belt channel is formed on the top wall of the film outlet head away from the glass. The reflective film belt passes through the film belt channel. The length direction of the film belt channel is inclined, and the side of the film belt channel away from the feeding assembly is inclined downward. Moreover, the end of the film belt channel away from the feeding assembly is arranged towards the contact point between the pressure roller and the glass.
[0012] By adopting the above technical solution, during the pasting process, the reflective film belt is always within the film belt channel of the film outlet head. It is difficult for the reflective film belt to move in the width direction of the film outlet head, reducing the possibility of the reflective film belt deviating and breaking away from the control of the film outlet head and the pressure roller, and improving the stability and accuracy of the adhesion of the reflective film belt.
[0013] Optionally, the feeding member includes a feeding air cylinder, a connecting block, two clamping plates, a pressing air cylinder, and a pressing block. The housing of the feeding air cylinder is installed on the tooling plate. The connecting block is connected to the air cylinder shaft of the feeding air cylinder. The two clamping plates are installed on the connecting block. There is a gap for the reflective film belt to pass through between the two clamping plates. The length direction of the clamping plates is arranged parallel to the movement direction of the reflective film belt and also parallel to the length direction of the film belt channel. The end of the clamping plate away from the feeding assembly is arranged towards the film outlet head. The housing of the pressing air cylinder is installed on the connecting block. The pressing block is installed on the air cylinder shaft of the pressing air cylinder. The bottom wall of the pressing block away from the pressing air cylinder faces the clamping plate. The pressing air cylinder drives the pressing block to approach or move away from the clamping plate. A pressing hole is formed on the clamping plate close to the pressing block to expose the reflective film belt. The pressing block can pass through this clamping plate through the pressing hole to contact the reflective film belt and press the reflective film belt against the other clamping plate.
[0014] Optionally, a sliding groove is formed on the tooling plate. The sliding groove penetrates through the thickness direction of the tooling plate. The length direction of the sliding groove is arranged parallel to the movement direction of the reflective film belt. The feeding air cylinder is installed on the side wall of the tooling plate facing away from the pressure roller. A sliding block is installed on the air cylinder shaft of the feeding air cylinder. The sliding block is inserted into the sliding groove, and the end of the sliding block away from the feeding air cylinder passes through the tooling plate through the sliding groove to be connected to the connecting block. The feeding air cylinder drives the sliding block to move, driving the connecting block to move.
[0015] By adopting the above technical solution, the feeding cylinder drives the clamping plate to move through the sliding block inserted in the sliding groove, thereby improving the accuracy of the clamping plate movement, ensuring that the clamping plate is accurately moved between the pressure roller and the film output head, and reducing the possibility of feeding failure caused by clamping plate deviation.
[0016] Optionally, the shearing member includes a first cutter, a second cutter and a shearing drive member, the middle parts of the first cutter and the second cutter are rotatably connected via a first shaft, the side wall of the first cutter is in contact with the side wall of the second cutter, and the shearing drive member drives the first cutter and the second cutter to open or close; the blades of the first cutter and the second cutter are arranged between the film outlet head and the clamping plate, the plane where the first cutter and the second cutter are located is arranged perpendicular to the moving direction of the reflective film tape, and the reflective film tape passes between the blades of the opened first cutter and the second cutter; the clamping plate can also pass between the blades of the opened first cutter and the second cutter.
[0017] Optionally, the first cutter is fixed on the tooling plate, and the blade portion of the first cutter is horizontally arranged; the shearing drive component includes a first shearing cylinder and a rotating block, the outer shell of the first shearing cylinder is installed on the tooling plate, the rotating block is installed on the cylinder shaft of the first shearing cylinder, and the rotating block is rotatably connected to an end of the second cutter away from the blade portion.
[0018] By adopting the above technical solution, when feeding, the cylinder shaft of the first shearing cylinder extends, and the rotating block drives the end of the second cutter away from the blade to rotate downward, and the blade of the second cutter is away from the blade of the first cutter. When cutting is required, the cylinder shaft of the first shearing cylinder retracts to drive the rotating block to rise, and the rotating block drives the end of the second cutter away from the blade to rotate upward until the blade of the second cutter intersects with the blade of the first cutter to cut the reflective film tape. Compared with the prior art method of using a single cutter to press the reflective film tape off, the present application adopts a shearing method to avoid the collision of the cutter's blade with other parts, thereby increasing the service life of the cutter. However, the cutter is prone to being unable to cut after being worn, and the present application adopts a shearing method to improve the accuracy of cutting the reflective film tape.
[0019] Optionally, the first cutting knife and the second cutting knife are rotatably connected to the tooling plate through a first shaft rod. The shearing driving member includes a second shearing cylinder, a first connecting piece, a second connecting piece, a roller and a control block. One end of the first cutting knife away from the blade part is rotatably connected to the first connecting piece through a third shaft rod. One end of the second cutting knife away from the blade part is rotatably connected to the second connecting piece through a fourth shaft rod. One end of the first connecting piece away from the third shaft rod is rotatably connected to one end of the second connecting piece away from the fourth shaft rod through a second shaft rod. The control block is arranged on the side of the second shaft rod away from the first shaft rod. A U-shaped groove is formed in the side wall of the control block close to the second shaft rod. The roller is rotatably connected to one end of the second shaft rod. The roller is inserted into the U-shaped groove and is adapted to the inner wall of the U-shaped groove. The housing of the second shearing cylinder is rotatably connected to the tooling plate. The cylinder shaft of the second shearing cylinder is rotatably connected to the third shaft rod. The second shearing cylinder drives the third shaft rod and the fourth shaft rod to approach or separate from each other to control the opening or closing of the first cutting knife and the second cutting knife.
[0020] By adopting the above technical solution, when feeding, the cylinder shaft of the second shearing cylinder retracts into the cylinder body, the third shaft rod and the fourth shaft rod move away from each other, the roller is located at one end of the U-shaped groove close to the first shaft rod, and the blade part of the first cutting knife is away from the second cutting knife. When it is necessary to cut the reflective film, the cylinder shaft of the second shearing cylinder extends to drive the third shaft rod and the fourth shaft rod to approach each other, the second shaft rod moves in the direction away from the first shaft rod, and the roller moves towards the bottom of the U-shaped groove. Until the distance between the third shaft rod and the fourth shaft rod is the smallest, the roller moves to the bottom of the U-shaped groove, and the blade parts of the first cutting knife and the second cutting knife intersect to cut the reflective film tape. During the movement, the roller and the U-shaped groove control the moving direction of the second shaft rod, improving the stability of the parallelogram structure formed by the first cutting knife, the second cutting knife, the first connecting piece and the second connecting piece. Compared with the fixed first cutting knife, the stroke of the cylinder shaft is shorter, and the required beat for shearing drive is shorter, further improving the accuracy of shearing.
[0021] Optionally, the heating member includes a hot air blower, a mica tube and a nozzle. The mica tube is installed on the tooling plate. One end of the mica tube away from the pressure roller is communicated with the hot air blower. The nozzle is installed at one end of the mica tube close to the pressure roller. The nozzle passes through from below the first cutting knife. One end of the nozzle away from the mica tube is arranged in the gap between the film outlet head and the glass. There is a gap between the bottom wall of the nozzle and the glass. One end of the nozzle away from the mica tube is arranged towards the contact point of the pressure roller and the glass. A hot air channel is arranged through the nozzle. The cross-sectional shape of the hot air channel is rectangular, and the width of the hot air channel is equal to the width of the reflective film tape.
[0022] By adopting the above technical solution, the high-temperature air flow blown out by the hot air blower is temporarily stored in the mica tube, and the mica tube plays a role in heat preservation and heat insulation. The nozzle passes through from below the first cutter and the film outlet head and blows hot air towards the contact point between the reflective film tape and the glass, reducing the influence of the hot air on other components, especially the cylinder, and reducing potential safety hazards; at the same time, it enables precise melting and reduces energy waste. The accuracy, stability, and safety of the entire film pasting process are improved.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. The operator guides the end of the reflective film tape into the feeding member. When it is necessary to paste the reflective film tape, the feeding member works once to send the end of the reflective film tape into the film pressing member, and the film pressing member presses the end of the reflective film tape onto the glass; at the same time, the heating member heats the contact point between the reflective film tape and the glass, causing the reflective film tape to be hot-melted and pasted on the glass. The working frame moves to drive the tooling plate to move relative to the glass, and the film pressing member continuously pulls out and pastes the reflective film tape on the glass as the tooling plate moves. When the reflective film tape on the glass reaches the set length, the shearing member works once to cut the reflective film tape at the position between the film pressing member and the feeding member, and the feeding member holds the end of the subsequent reflective film tape; at this time, the working frame continues to move, and the film pressing member pastes the remaining reflective film tape on the glass. During the film pasting process, the film pressing member always holds the reflective film tape, reducing the occurrence of the reflective film tape shifting, and improving the accuracy during the pasting process; and after the reflective film tape is cut, its rear end is still held by the film pressing member, reducing the occurrence of the tail end of the reflective film tape being pasted and shifted. The heating member heats the contact point between the reflective film tape and the glass, improving the heating accuracy and reducing the occurrence of the molten reflective film tape contacting the film pressing member or the shearing member and causing the reflective film tape to be damaged, thereby improving the accuracy of the pasting process. Compared with the prior art of cutting the reflective film tape, the present application adopts a shearing method to improve the accuracy of cutting the reflective film tape;
[0025] 2. The cylinder shaft of the first shearing cylinder extends, and the rotating block drives the end of the second cutter away from the blade part to rotate downward, and the blade part of the second cutter moves away from the blade part of the first cutter. When cutting is required, the cylinder shaft of the first shearing cylinder retracts to drive the rotating block to rise, and the rotating block drives the end of the second cutter away from the blade part to rotate upward until the blade part of the second cutter intersects with the blade part of the first cutter to cut the reflective film tape. Compared with the prior art of using a single cutter to press and cut the reflective film tape, the present application adopts a shearing method to avoid the blade of the cutter from colliding with other components, improving the service life of the cutter. And when the cutter is worn, it is prone to the situation of being unable to cut. The present application adopts a shearing method to improve the accuracy of cutting the reflective film tape;
[0026] 3. The high-temperature air flow blown by the hot air blower is temporarily stored in the mica tube, and the mica tube plays a role in heat preservation and heat insulation. The nozzle passes through from below the first cutting knife and the film outlet head and blows hot air towards the contact point between the reflective film belt and the glass, reducing the influence of the hot air on other components, especially the cylinder, and reducing potential safety hazards; at the same time, it melts precisely, reducing energy waste. It improves the accuracy, stability, and safety of the entire film pasting process. Brief Description of the Drawings
[0027] Figure 1 It is a schematic structural diagram of a photovoltaic film pasting machine according to Embodiment 1 of the present application.
[0028] Figure 2 It is a front structural schematic diagram of the film pasting assembly according to Embodiment 1 of the present application.
[0029] Figure 3 It is Figure 2 An enlarged view of A in
[0030] Figure 4 It is a back structural schematic diagram of the film pasting assembly according to Embodiment 1 of the present application.
[0031] Figure 5 It is Figure 4 An enlarged view of B in
[0032] Figure 6 It is a schematic structural diagram of the shearing drive member according to Embodiment 2 of the present application.
[0033] Description of the reference numerals: 11, lifting and moving mechanism; 12, horizontal film pasting mechanism, 13, vertical film pasting mechanism; 14, film pasting device; 15, linear module; 16, film pasting assembly; 17, feeding assembly; 2, tooling plate; 21, sliding groove; 3, film pressing member; 31, downward pressing cylinder; 32, pressing roller; 33, film outlet head; 331, film belt channel; 4, feeding member; 41, feeding cylinder; 42, connecting block; 43, clamping plate; 431, material pressing hole; 44, material pressing cylinder; 45, pressing block; 46, sliding block; 5, heating member; 51, hot air blower; 52, mica tube; 53, nozzle; 531, hot air channel; 6, shearing member; 61, first cutting knife; 62, second cutting knife; 63, shearing drive member; 631, first shaft rod; 632, second shaft rod; 6321, roller; 633, third shaft rod; 634, fourth shaft rod; 635, first connecting piece; 636, second connecting piece; 637, first shearing cylinder; 638, second shearing cylinder; 639, control block; 6391, U-shaped groove; 7, reflective film belt; 8, glass. Detailed Description of the Embodiment
[0034] The following is a further detailed description of the present application in conjunction with the attached Figures 1-6 drawings.
[0035] The embodiment of the present application discloses a photovoltaic film laminating machine.
[0036] Example 1
[0037] Reference Figure 1 A photovoltaic film laminating machine includes a lifting and moving mechanism 11 for transporting glass 8, and the lifting and moving mechanism 11 includes two lifting frames driven by a motor and a conveyor belt installed on the lifting frames. Two workbenches for temporarily placing glass 8 are arranged in the moving direction of the conveyor belt, and the lifting frames and the conveyor belt are embedded in the workbenches, and the lifting frames can drive the top surface of the conveyor belt to be flush with the workbenches. A tidying device for arranging the glass 8 is also arranged on the workbench, and the tidying device includes six push rods driven by a cylinder. A horizontal film laminating mechanism 12 and a vertical film laminating mechanism 13 are respectively arranged above the two workbenches. The horizontal film laminating mechanism 12 includes two film laminating devices 14 arranged in series horizontally and a linear module 15 for driving the film laminating device 14 to move, and the vertical film laminating mechanism 13 includes two film laminating devices 14 arranged in parallel vertically and a linear module 15 for driving the film laminating device 14 to move.
[0038] The film pasting device 14 includes a work frame, which is connected to the movable end of the linear module 15. A plurality of film pasting assemblies 16 are arranged in the length direction of the work frame, and the film pasting assemblies 16 on the two work frames arranged in series are arranged in staggered positions, and the number of film pasting assemblies 16 is set according to the number of reflective film strips 7 required to be pasted. A feeding assembly 17 for supplying reflective film strips 7 to the film pasting assemblies 16 is also arranged on the work frame, and the feeding assembly 17 includes a plurality of reflective film strips 7 rolls rotatably arranged on the work frame.
[0039] The operator guides the end of the reflective film tape 7 into the film sticking assembly 16, and the reflective film tape 7 is automatically fed under the action of tension. After the operator assembles the glass 8, it is placed on the conveyor belt. At this time, the lifting frame drives the conveyor belt to be higher than the workbench. The conveyor belt moves the glass 8 to the top of the first workbench through friction. The lifting frame drives the conveyor belt to descend so that the top surface of the conveyor belt is lower than the workbench, and the glass 8 is placed on the workbench. The regularization device aligns the glass 8 in the center. The linear module 15 drives the two series-connected work frames to move horizontally along the glass 8, and the film sticking assembly 16 pastes the reflective film tape 7 of a suitable length on the glass 8 in the horizontal direction. The lifting frame drives the conveyor belt to lift up so that the glass 8 moves upward and leaves the first workbench. The conveyor belt starts to drive the glass 8 to move above the second workbench. The lifting frame drives the conveyor belt to descend and place the glass 8 on the workbench. The regularization device aligns the glass 8 in the center. The linear module 15 drives the two parallel work frames to move longitudinally along the glass 8, and the film sticking assembly 16 pastes the reflective film tape 7 of a suitable length on the glass 8 in the longitudinal direction. The automatic pasting of the longitudinal and transverse reflective film tapes 7 is realized.
[0040] Reference Figure 2, the film laminating assembly 16 includes a tooling plate 2 which is vertically arranged and installed at the bottom of the working rack. A film pressing member 3 is arranged on one side of the tooling plate 2 close to the glass 8. The film pressing member 3 can clamp the reflective film strip 7 and press it onto the glass 8. A feeding member 4 is arranged on the tooling plate 2 near the feeding assembly 17. The feeding member 4 is used to feed the reflective film strip 7 into the film pressing member 3. A heating member 5 for heating the reflective film strip 7 is arranged between the film pressing member 3 and the feeding member 4; a shearing member 6 is also arranged between the film pressing member 3 and the feeding member 4 to shear the reflective film strip 7.
[0041] The operator guides the end of the reflective film strip 7 into the feeding member 4. When it is necessary to paste the reflective film strip 7, the feeding member 4 works once to feed the end of the reflective film strip 7 into the film pressing member 3, and the film pressing member 3 presses the end of the reflective film strip 7 onto the glass 8; meanwhile, the heating member 5 heats the contact point between the reflective film strip 7 and the glass 8 to make the reflective film strip 7 be hot-melt pasted on the glass 8. The movement of the working rack drives the tooling plate 2 to move relative to the glass 8, and the film pressing member 3 continuously pulls out the reflective film strip 7 and pastes it on the glass 8 as the tooling plate 2 moves. When the reflective film strip 7 on the glass 8 reaches the set length, the shearing member 6 works once to cut off the reflective film strip 7 at the position between the film pressing member 3 and the feeding member 4, and the feeding member 4 clamps the end of the subsequent reflective film strip 7; at this time, the working rack continues to move, and the film pressing member 3 pastes the remaining reflective film strip 7 on the glass 8.
[0042] During the film laminating process, the film pressing member 3 always clamps the reflective film strip 7, reducing the occurrence of the deviation of the reflective film strip 7 and improving the accuracy during the pasting process; and after the reflective film strip 7 is cut off, its rear end is still clamped by the film pressing member 3, reducing the occurrence of the deviation of the pasting of the tail end of the reflective film strip 7. The heating member 5 heats the contact point between the reflective film strip 7 and the glass 8, improving the heating accuracy and reducing the occurrence of the damage of the reflective film strip 7 caused by the contact between the molten reflective film strip 7 and the film pressing member 3 or the shearing member 6, and improving the accuracy of the pasting process. Compared with the prior art of cutting off the reflective film strip 7, the present application adopts a shearing method to improve the accuracy of cutting the reflective film strip 7.
[0043] Refer to Figure 2 and Figure 3, the film pressing member 3 includes a downward pressing air cylinder 31. The outer shell of the downward pressing air cylinder 31 is fixedly installed on the tooling plate 2 by bolts. The downward pressing air cylinder 31 is located at the bottom of the tooling plate 2 at the end far from the feeding assembly 17. The downward pressing air cylinder 31 is installed vertically upside down. A pressing roller 32 is rotatably installed at the bottom end of the cylinder shaft of the downward pressing air cylinder 31. The downward pressing air cylinder 31 drives the pressing roller 32 to approach or move away from the glass 8 in the vertical direction. The outer peripheral wall of the pressing roller 32 contacts the top surface of the reflective film strip 7. The length of the pressing roller 32 in its axial direction is greater than the width of the reflective film strip 7. The pressing roller 32 can press the reflective film strip 7 onto the glass 8. A film outlet head 33 is provided on the side of the pressing roller 32 close to the feeding assembly 17. The film outlet head 33 is fixedly installed on the tooling plate 2 by bolts. There is a gap between the bottom wall of the film outlet head 33 and the glass 8. A film strip channel 331 is formed on the top wall of the film outlet head 33 far from the glass 8. The reflective film strip 7 passes through the film strip channel 331. The length direction of the film strip channel 331 is inclined. The side of the film strip channel 331 far from the feeding assembly 17 is inclined downward, and the end of the film strip channel 331 far from the feeding assembly 17 is arranged towards the contact point between the pressing roller 32 and the glass 8. When the pressing roller 32 is at its lowest point, it can jointly clamp the reflective film strip 7 with the film outlet head 33.
[0044] Referring to Figure 3 and Figure 4 , the feeding member 4 includes a feeding air cylinder 41. Since the space on the side of the tooling plate 2 where the pressing air cylinder 44 is installed is insufficient, the feeding air cylinder 41 is arranged on the side wall of the tooling plate 2 facing away from the downward pressing air cylinder 31. The outer shell of the feeding air cylinder 41 is fixedly installed on the tooling plate 2 near the feeding assembly 17 by bolts. The cylinder shaft of the feeding air cylinder 41 faces the pressing roller 32. A sliding block 46 is installed on the cylinder shaft of the feeding air cylinder 41 by bolts. A sliding groove 21 is formed on the tooling plate 2. The sliding groove 21 penetrates through the thickness direction of the tooling plate 2, and the length direction of the sliding groove 21 is arranged parallel to the moving direction of the reflective film strip 7. The sliding block 46 is inserted into the sliding groove 21. The feeding air cylinder 41 drives the sliding block 46 to reciprocate along the length direction of the sliding groove 21.
[0045] Referring to Figure 3, one end of the sliding block 46 away from the feeding cylinder 41 passes through the tooling plate 2 through the sliding groove 21. A connecting block 42 is installed at one end of the sliding block 46 away from the feeding cylinder 41 by bolts. The feeding cylinder 41 drives the sliding block 46 to move, driving the connecting block 42 to reciprocate along the moving direction of the reflective film belt 7. Two clamping plates 43 are installed on the connecting block 42. The length direction of the clamping plates 43 is arranged parallel to the moving direction of the reflective film belt 7, and also parallel to the length direction of the film belt channel 331. One end of the clamping plate 43 away from the feeding component 17 faces the film outlet head 33. There is a gap for the reflective film belt 7 to pass through between the two clamping plates 43. A pressing hole 431 is opened on the upper clamping plate 43 to expose the reflective film belt 7. A pressing cylinder 44 is arranged on one side of the connecting block 42 away from the clamping plate 43. The housing of the pressing cylinder 44 is installed on the top wall of the connecting block 42 by bolts. A hole is opened on the top wall of the connecting block 42 for the cylinder shaft of the pressing cylinder 44 to pass through. One end of the cylinder shaft of the pressing cylinder 44 protruding from the connecting block 42 is threadedly connected with a pressing block 45. The bottom wall of the pressing block 45 away from the pressing cylinder 44 faces the pressing hole 431. The pressing cylinder 44 drives the pressing block 45 to approach or move away from the clamping plate 43. The pressing block 45 can pass through this clamping plate 43 through the pressing hole 431 to contact the reflective film belt 7 and press the reflective film belt 7 against the other clamping plate 43.
[0046] Refer to Figure 3 and Figure 4 , the shearing member 6 includes a first cutter 61 and a second cutter 62. The middle parts of the first cutter 61 and the second cutter 62 are rotatably connected by a first shaft rod 631. The side wall of the first cutter 61 is attached to the side wall of the second cutter 62. The cutting edges of the first cutter 61 and the second cutter 62 are arranged between the film outlet head 33 and the clamping plate 43. The plane where the first cutter 61 and the second cutter 62 are located is arranged perpendicular to the moving direction of the reflective film belt 7. Due to the insufficient space on the side of the tooling plate 2 where the pressing cylinder 44 is installed, a shearing driving member 63 is arranged on the side wall of the tooling plate 2 away from the pressing cylinder 31. The shearing driving member 63 drives the first cutter 61 and the second cutter 62 to open or close. The reflective film belt 7 passes through between the cutting edges of the opened first cutter 61 and second cutter 62, and the clamping plate 43 can also pass through between the cutting edges of the opened first cutter 61 and second cutter 62.
[0047] Refer to Figure 3The heating element 5 includes a mica tube 52, which is mounted on the tooling plate 2 through a plate and is located below the clamping plate 43. The end of the mica tube 52 away from the pressure roller 32 is connected to the hot air blower 51, and the hot air blower 51 is installed on the work frame. A nozzle 53 is installed at the end of the mica tube 52 close to the pressure roller 32. The nozzle 53 is flat and passes through the bottom of the first cutter 61. The end of the nozzle 53 away from the mica tube 52 is set in the gap between the film head 33 and the glass 8, and there is a gap between the bottom wall of the nozzle 53 and the glass 8. A hot air channel 531 is set through the nozzle 53, and the hot air channel 531 is connected to the inside of the mica tube 52. The cross-sectional shape of the hot air channel 531 is rectangular, and the width of the hot air channel 531 is equal to the width of the reflective film belt 7. The end of the hot air channel 531 away from the mica tube 52 is set toward the contact point between the pressure roller 32 and the glass 8.
[0048] The operator holds the end of the reflective film tape 7 and inserts it between the two clamps 43 from the end of the clamp 43 close to the feeding assembly 17 and passes it out from the end close to the pressure roller 32, so that the end of the reflective film tape 7 protrudes from the clamp 43, and the pressing cylinder 44 drives the pressing block 45 to press the reflective film tape 7 on the clamp 43 through the pressing hole 431. At this time, the pressing cylinder 31 controls the pressure roller 32 to move away from the glass 8, the shearing drive 63 drives the first cutter 61 and the second cutter 62 to be in an open state, and the feeding cylinder 41 controls the clamp 43 to move away from the pressure roller 32. When the reflective film tape 7 needs to be attached, the feeding cylinder 41 drives the sliding block 46 to move downward along the inner wall of the sliding groove 21, and the sliding block 46 moves through the connecting block 42 to drive the clamp 43 to approach the pressure roller 32, and the pressing cylinder 44 drives the pressing block 45 to maintain the pressing state and pull the reflective film tape 7 in the direction close to the film outlet head 33. Until the end of the clamping plate 43 away from the feeding assembly 17 passes through the gap between the first cutter 61 and the second cutter 62, and the end of the reflective film tape 7 is sent into the film tape channel 331; at this time, the downward pressure cylinder 31 drives the pressure roller 32 to descend and clamp the reflective film tape 7 together with the film head 33, and the end of the reflective film tape 7 just contacts the glass 8. The high-temperature airflow blown out by the hot air blower 51 is temporarily stored in the mica tube 52, and at this time it is blown out from the nozzle 53 and melts the contact between the reflective film tape 7 and the glass 8, so that the end of the reflective film tape 7 is attached to the glass 8. When the working frame starts to move, the pressing cylinder 44 drives the pressing block 45 away from the clamping plate 43 to release the control of the reflective film tape 7, and the reflective film tape 7 moves along the gap between the two clamping plates 43 and the film tape channel 331, and the pressure roller 32 rolls to press the reflective film tape 7 flat on the glass 8, and discharges the air that may exist between the reflective film tape 7 and the glass 8.
[0049] When the reflective film tape 7 needs to be cut, the shear drive 63 drives the blades of the first cutter 61 and the second cutter 62 to close, and the first cutter 61 and the second cutter 62 cut the reflective film tape 7. At the same time, the pressing cylinder 44 drives the pressing block 45 to press the subsequent reflective film tape 7 onto the clamping plate 43, and the remaining reflective film tape 7 is still clamped by the pressing roller 32 and the film head 33. At this time, the working frame continues to move to paste the remaining reflective film tape 7. After the pasting is completed, the pressing cylinder 31 drives the pressing roller 32 to lift up, and the nozzle 53 stops blowing hot air. Wait for the next pasting.
[0050] The feeding cylinder 41 drives the clamping plate 43 to move through the sliding block 46 inserted in the sliding groove 21, thereby improving the accuracy of the movement of the clamping plate 43, ensuring that the clamping plate 43 moves accurately between the pressure roller 32 and the film head 33, and reducing the possibility of feeding failure caused by the deviation of the clamping plate 43. During the pasting process, the reflective film tape 7 is always in the film tape channel 331 of the film head 33, and the reflective film tape 7 is difficult to move in the width direction of the film head 33, thereby improving the stability and accuracy of the pasting of the reflective film tape 7. The pressure roller 32 flattens the molten reflective film tape 7 on the glass 8, making the reflective film tape 7 and the glass 8 more closely pasted. The nozzle 53 passes through the bottom of the first cutter 61 and the film head 33 and blows hot air toward the contact point between the reflective film tape 7 and the glass 8, thereby reducing the influence of hot air on other components, especially the cylinder, and reducing safety hazards; at the same time, accurate melting is performed to reduce energy waste. The accuracy, stability and safety of the entire film pasting process are improved.
[0051] Reference Figure 3 and Figure 5 The shear drive member 63 includes a first shear cylinder 637, which is arranged on the side of the tooling plate 2 away from the pressing cylinder 31, and the housing of the first shear cylinder 637 is fixedly mounted on the tooling plate 2 by bolts. A rotating block is threadedly connected to the cylinder shaft of the first shear cylinder 637, and the rotating block is rotatably connected to the end of the second cutter 62 away from the blade. The first cutter 61 is fixedly mounted on the tooling plate 2 by bolts, and the blade of the first cutter 61 is arranged upward.
[0052] When feeding, the cylinder shaft of the first shearing cylinder 637 extends, and the rotating block drives the end of the second cutter 62 away from the blade to rotate downward, and the blade of the second cutter 62 is away from the blade of the first cutter 61. When cutting is required, the cylinder shaft of the first shearing cylinder 637 retracts to drive the rotating block to rise, and the rotating block drives the end of the second cutter 62 away from the blade to rotate upward until the blade of the second cutter 62 intersects with the blade of the first cutter 61, and the reflective film strip 7 is cut off. Compared with the method of using a single cutter to press the reflective film strip 7 in the prior art, the present application adopts a shearing method to avoid the collision of the blade of the cutter with other parts, thereby increasing the service life of the cutter. However, the cutter is prone to being unable to cut after being worn, and the present application adopts a shearing method to improve the accuracy of cutting the reflective film strip 7.
[0053] The implementation principle of Embodiment 1 is as follows: The lifting and conveying mechanism transports the glass 8 to two workbenches in sequence. The linear module 15 drives the workbench to move. When the workbench moves, the pressing block 45 and the clamping plate 43 pull the end of the reflective film tape 7 and send it between the pressing roller 32 and the film outlet head 33. The hot air blown by the nozzle 53 melts the contact point between the reflective film tape 7 and the glass 8. The pressing roller 32 presses the reflective film tape 7 flat and pastes it on the glass 8. After the film pasting reaches the set length, the first shearing cylinder 637 drives the second cutter 62 to move, so that the cutting edge of the second cutter 62 and the first cutter 61 are staggered to cut the reflective film tape 7. During the pasting process, the reflective film tape 7 is always in the film tape channel 331 of the film outlet head 33, and it is difficult for the reflective film tape 7 to move in the width direction of the film outlet head 33, which improves the stability and accuracy of the pasting of the reflective film tape 7. The pressing roller 32 presses the molten reflective film tape 7 flat on the glass 8, making the pasting of the reflective film tape 7 and the glass 8 closer. The nozzle 53 passes through the lower part of the first cutter 61 and the film outlet head 33 and blows hot air towards the contact point between the reflective film tape 7 and the glass 8, reducing the influence of the hot air on other components, especially the cylinders, and reducing potential safety hazards; at the same time, it melts accurately, reducing energy waste. It improves the accuracy, stability and safety of the entire film pasting process.
[0054] Embodiment 2
[0055] Refer to Figure 6, the difference between this embodiment and Embodiment 1 is that the first cutting knife 61 and the second cutting knife 62 are rotatably connected to the tooling plate 2 through the first shaft rod 631. One end of the first cutting knife 61 away from the blade part is rotatably connected to the first connecting piece 635 through the third shaft rod 633, and one end of the second cutting knife 62 away from the blade part is rotatably connected to the second connecting piece 636 through the fourth shaft rod 634. One end of the first connecting piece 635 away from the third shaft rod 633 is rotatably connected to one end of the second connecting piece 636 away from the fourth shaft rod 634 through the second shaft rod 632. The connection lines of the first shaft rod 631, the second shaft rod 632, the third shaft rod 633 and the fourth shaft rod 634 enclose a parallelogram, and the second shaft rod 632, the third shaft rod 633 and the fourth shaft rod 634 are all movably arranged. On one side of the second shaft rod 632 away from the first shaft rod 631, a control block 639 is provided, and the control block 639 is fixedly installed on the tooling plate 2 through a plate. A U-shaped groove 6391 is opened on the side wall of the control block 639 close to the second shaft rod 632. One end of the second shaft rod 632 is rotatably connected with a roller 6321, and the roller 6321 is inserted into the U-shaped groove 6391 and is adapted to the inner wall of the U-shaped groove 6391. The shearing driving member 63 includes a second shearing cylinder 638. The housing of the second shearing cylinder 638 is rotatably connected to the tooling plate 2 through a rotating shaft, and the cylinder shaft of the second shearing cylinder 638 is rotatably connected to the third shaft rod 633. The second shearing cylinder 638 drives the third shaft rod 633 and the fourth shaft rod 634 to approach or move away from each other to control the opening or closing of the first cutting knife 61 and the second cutting knife 62.
[0056] The implementation principle of Embodiment 2 is as follows: When feeding, the cylinder shaft of the second shearing cylinder 638 retracts into the cylinder body, the third shaft rod 633 and the fourth shaft rod 634 move away from each other, the roller 6321 is located at one end of the U-shaped groove 6391 close to the first shaft rod 631, and the blade part of the first cutting knife 61 is away from the second cutting knife 62. When it is necessary to cut the reflective film, the cylinder shaft of the second shearing cylinder 638 extends to drive the third shaft rod 633 and the fourth shaft rod 634 to approach each other, the second shaft rod 632 moves in a direction away from the first shaft rod 631, and the roller 6321 moves towards the bottom of the U-shaped groove 6391. Until the distance between the third shaft rod 633 and the fourth shaft rod 634 is the smallest, the roller 6321 moves to the bottom of the U-shaped groove 6391, and the blade parts of the first cutting knife 61 and the second cutting knife 62 intersect to cut the reflective film tape 7. During the movement, the roller 6321 and the U-shaped groove 6391 control the moving direction of the second shaft rod 632, improving the stability of the parallelogram structure formed by the first cutting knife 61, the second cutting knife 62, the first connecting piece 635 and the second connecting piece 636. Compared with Embodiment 1, in Embodiment 2, the stroke of the cylinder shaft is shorter, the beat required for shearing drive is shorter, and the accuracy of shearing is further improved.
[0057] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A photovoltaic film pasting machine, comprising a lifting and moving mechanism (11) for conveying glass (8), a transverse film pasting mechanism (12) and a longitudinal film pasting mechanism (13) arranged in the length direction of the lifting and moving mechanism (11); the transverse film pasting mechanism (12) comprises a plurality of film pasting devices (14) arranged in series transversely and a linear module (15) for driving the film pasting devices (14) to move, and the longitudinal film pasting mechanism (13) comprises a plurality of film pasting devices (14) arranged in parallel longitudinally and a linear module (15) for driving the film pasting devices (14) to move; the film pasting device (14) comprises a plurality of film pasting assemblies (16) and a feeding assembly (17) for supplying a reflective film tape (7) to the film pasting assemblies (16), characterized in that: The film laminating component (16) comprises a tooling plate (2), a film pressing component (3) is arranged on the side of the tooling plate (2) close to the glass (8), and the film pressing component (3) can clamp the reflective film strip (7) and press it onto the glass (8); a feeding component (4) is arranged on the tooling plate (2) close to the feeding component (17), and the feeding component (4) is used to feed the reflective film strip (7) into the film pressing component (3); a heating component (5) for heating the reflective film strip (7) is arranged between the film pressing component (3) and the feeding component (4), and a shearing component (6) is arranged between the heating component (5) and the film pressing component (3) to shear the reflective film strip (7).
2. A photovoltaic film laminating machine according to claim 1, characterized in that: The film pressing member (3) comprises a pressing cylinder (31), a pressing roller (32) and a film discharging head (33); the outer shell of the pressing cylinder (31) is mounted on the tooling plate (2); the pressing roller (32) is rollingly mounted on the cylinder shaft of the pressing cylinder (31); the pressing cylinder (31) drives the pressing roller (32) to approach or move away from the glass (8) in the vertical direction; the pressing roller (32) can press the reflective film strip (7) onto the glass (8); the film discharging head (33) is mounted on the tooling plate (2) and is located on a side of the pressing roller (32) close to the feeding assembly (17); when the pressing roller (32) is at its lowest point, it can clamp the reflective film strip (7) together with the film discharging head (33); there is a gap between the bottom wall of the film discharging head (33) and the glass (8).
3. A photovoltaic film laminating machine according to claim 2, characterized in that: A film strip channel (331) is provided on the top wall of the film outlet head (33) away from the glass (8), and the reflective film strip (7) passes through the film strip channel (331). The film strip channel (331) is inclined in the length direction, and the film strip channel (331) is inclined downward on the side away from the feeding assembly (17), and the end of the film strip channel (331) away from the feeding assembly (17) is arranged toward the contact point between the pressure roller (32) and the glass (8).
4. A photovoltaic film laminating machine according to claim 3, characterized in that: The feeding member (4) comprises a feeding cylinder (41), a connecting block (42), two clamping plates (43), a pressing cylinder (44) and a pressing block (45); the outer shell of the feeding cylinder (41) is mounted on the tooling plate (2); the connecting block (42) is connected to the cylinder shaft of the feeding cylinder (41); the two clamping plates (43) are mounted on the connecting block (42); there is a gap between the two clamping plates (43) to accommodate the passage of the reflective film tape (7); the length direction of the clamping plate (43) is parallel to the movement direction of the reflective film tape (7) and also parallel to the length direction of the film tape channel (331); the end of the clamping plate (43) away from the feeding assembly (17) is directed toward A film discharge head (33) is provided; the outer shell of the pressing cylinder (44) is installed on the connecting block (42); the pressing block (45) is installed on the cylinder shaft of the pressing cylinder (44); the pressing block (45) is arranged away from the bottom wall of the pressing cylinder (44) and toward the clamping plate (43); the pressing cylinder (44) drives the pressing block (45) to approach or move away from the clamping plate (43); a pressing hole (431) is provided on the clamping plate (43) close to the pressing block (45) to expose the reflective film strip (7); the pressing block (45) can pass through the clamping plate (43) through the pressing hole (431) to contact the reflective film strip (7) and press the reflective film strip (7) onto the other clamping plate (43).
5. A photovoltaic film laminating machine according to claim 4, characterized in that: The tooling plate (2) is provided with a sliding groove (21), the sliding groove (21) runs through the tooling plate (2) in a thickness direction, and the length direction of the sliding groove (21) is arranged parallel to the movement direction of the reflective film tape (7); the feeding cylinder (41) is installed on the side wall of the tooling plate (2) away from the pressure roller (32), and a sliding block (46) is installed on the cylinder shaft of the feeding cylinder (41), and the sliding block (46) is inserted in the sliding groove (21), and the end of the sliding block (46) away from the feeding cylinder (41) passes through the tooling plate (2) through the sliding groove (21) and is connected to the connecting block (42), and the feeding cylinder (41) drives the sliding block (46) to move, thereby driving the connecting block (42) to move.
6. The photovoltaic film laminating machine according to claim 4, characterized in that: The shearing member (6) comprises a first cutter (61), a second cutter (62) and a shearing driving member (63); the middle parts of the first cutter (61) and the second cutter (62) are rotatably connected via a first shaft (631); the side wall of the first cutter (61) is in contact with the side wall of the second cutter (62); the shearing driving member (63) drives the first cutter (61) and the second cutter (62) to open or close; the blades of the first cutter (61) and the second cutter (62) are arranged between the film discharge head (33) and the clamping plate (43); the plane where the first cutter (61) and the second cutter (62) are located is arranged perpendicular to the moving direction of the reflective film strip (7); the reflective film strip (7) passes between the blades of the opened first cutter (61) and the second cutter (62); the clamping plate (43) can also pass between the blades of the opened first cutter (61) and the second cutter (62).
7. A photovoltaic film laminating machine according to claim 6, characterized in that: The first cutter (61) is fixed on the tooling plate (2), and the blade of the first cutter (61) is arranged horizontally; the shearing drive component (63) comprises a first shearing cylinder (637) and a rotating block, the shell of the first shearing cylinder (637) is installed on the tooling plate (2), the rotating block is installed on the cylinder shaft of the first shearing cylinder (637), and the rotating block is rotatably connected to an end of the second cutter (62) away from the blade.
8. The photovoltaic film laminating machine according to claim 6, characterized in that: The first cutting knife (61) and the second cutting knife (62) are rotatably connected to the tooling plate (2) via a first shaft (631); the shearing drive member (63) comprises a second shearing cylinder (638), a first connecting plate (635), a second connecting plate (636), a roller (6321) and a control block (639); an end of the first cutting knife (61) away from the blade portion is rotatably connected to the first connecting plate (635) via a third shaft (633); an end of the second cutting knife (62) away from the blade portion is rotatably connected to the second connecting plate (636) via a fourth shaft (634); an end of the first connecting plate (635) away from the third shaft (633) and an end of the second connecting plate (636) away from the fourth shaft (634) are rotatably connected via the second shaft (632); the control block (639) is arranged on the side of the second shaft (632) away from the first shaft (631), and a U-shaped groove (6391) is opened on the side wall of the control block (639) close to the second shaft (632), and the roller (6321) is rotatably connected to one end of the second shaft (632), and the roller (6321) is inserted in the U-shaped groove (6391) and adapted to the inner wall of the U-shaped groove (6391); the outer shell of the second shearing cylinder (638) is rotatably connected to the tooling plate (2), and the cylinder shaft of the second shearing cylinder (638) is rotatably connected to the third shaft (633), and the second shearing cylinder (638) drives the third shaft (633) and the fourth shaft (634) to move closer to or farther from each other, so as to control the first cutter (61) and the second cutter (62) to open or close.
9. The photovoltaic film laminating machine according to claim 6, characterized in that: The heating element (5) comprises a hot air blower (51), a mica tube (52) and a nozzle (53); the mica tube (52) is mounted on the tooling plate (2); an end of the mica tube (52) away from the pressure roller (32) is connected to the hot air blower (51); the nozzle (53) is mounted on an end of the mica tube (52) close to the pressure roller (32); the nozzle (53) passes through below the first cutter (61); and an end of the mica tube (52) away from the pressure roller (32) is provided The nozzle (53) is disposed in the gap between the film outlet head (33) and the glass (8), and there is a gap between the bottom wall of the nozzle (53) and the glass (8); the end of the nozzle (53) away from the mica tube (52) is arranged toward the contact point between the pressure roller (32) and the glass (8); a hot air channel (531) is arranged through the nozzle (53), the cross-sectional shape of the hot air channel (531) is rectangular, and the width of the hot air channel (531) is equal to the width of the reflective film strip (7).